I belive its not copy, it's move, you gotta unzip And then you drag that folder inside the base game and insert it into the game folder ? If You copy then it can result in an error ( srry 4 the bad english idk how to explain .. )
I had the same issue! The issue may lie in what version of the game you have downloaded. Make sure it's the most recent 5.5 updated version and not any previous ones because it won't work. Follow the video instructions as well!
